Gemstones with SG 3.65
12 gemstones have a specific gravity range that includes 3.65. Specific gravity measures density relative to water — a key diagnostic property for gem identification. Measured by hydrostatic weighing or heavy liquids.
| Gemstone | SG Range | RI Range | Crystal System | Hardness |
|---|---|---|---|---|
| Grossular Garnet | 3.57 – 3.73 | 1.734 – 1.759 | Cubic | 6.5–7.5 |
| Benitoite | 3.64 – 3.68 | 1.757 – 1.804 | Hexagonal | 6–6.5 |
| Rhodonite | 3.57 – 3.76 | 1.716 – 1.752 | Triclinic | 5.5–6.5 |
| Hessonite Garnet | 3.59 – 3.65 | 1.730 – 1.760 | Cubic | 7–7.5 |
| Tsavorite Garnet | 3.59 – 3.65 | 1.730 – 1.760 | Cubic | 7–7.5 |
| Kyanite | 3.53 – 3.68 | 1.712 – 1.734 | Triclinic | 4.5–7 |
| Synthetic Spinel | 3.52 – 3.65 | 1.725 – 1.728 | Cubic | 8 |
| Color-Change Garnet | 3.65 – 3.80 | 1.740 – 1.765 | Cubic | 7–7.5 |
| Pyrope Garnet | 3.62 – 3.87 | 1.730 – 1.760 | Cubic | 7–7.5 |
| Rhodochrosite | 3.40 – 3.70 | 1.600 – 1.820 | Trigonal | 3.5–4 |
| Malaya / Umbalite Garnet | 3.65 – 3.87 | 1.730 – 1.780 | Cubic | 7–7.5 |
| Malachite | 3.60 – 4.05 | 1.655 – 1.909 | Monoclinic | 3.5–4 |